Resilient Seated Butterfly Valve

What Are The Types Of Resilient Seated Butterfly Valve?

1. Double Offset Resilient Seated Butterfly Valve:
   • The disc is offset from the valve’s centerline in two directions, creating a self-relieving seat design that improves sealing performance.
   • Provides reliable isolation and effective flow control in a wide range of applications.
2. Triple Offset Resilient Seated Butterfly Valve:
   • Features a more complex triple offset disc design, further enhancing sealing capabilities and reducing friction.
   • Offers exceptional tight shut-off and precise flow modulation, making it suitable for critical control applications.
3. Concentric Resilient Seated Butterfly Valve:
   • The disc is aligned concentrically with the valve body, providing a simpler and more cost-effective solution.
   • Commonly used in less demanding applications where tight sealing is not the primary requirement.
4. High Performance Resilient Seated Butterfly Valve:
   • Combines the advanced design features of double or triple offset valves with specialized materials and coatings.
   • Designed to withstand harsh operating conditions, such as high temperatures, pressures, and corrosive media.

What Is Resilient Seated Butterfly Valve?

Resilient Seated Butterfly Valve is a specialized type of valve that incorporates a resilient, flexible seat material to create a tight, reliable seal. Unlike traditional metal-to-metal seating designs, the resilient seat in these valves is made from elastomeric materials, such as rubber or polymer compounds, which can effectively compensate for wear, thermal expansion, and minor surface irregularities. This resilient seating mechanism allows Resilient Seated Butterfly Valve to achieve superior shutoff performance, even in the presence of particulates or media that may compromise the sealing of conventional butterfly valves. The combination of a resilient seat and the inherent design advantages of the butterfly valve configuration makes this valve type a popular choice for a wide range of industrial applications, from process control to emergency isolation.

How to Select the Right Resilient Seated Butterfly Valve?

When selecting the appropriate Resilient Seated Butterfly Valve for an application, key factors to consider include the operating conditions, media compatibility, and the required performance characteristics. Evaluating the valve size, pressure rating, and temperature range is crucial to ensure the valve can withstand the expected service environment. Additionally, the resilient seat material must be compatible with the process fluid to prevent premature deterioration or chemical attack. Other important selection criteria include the required shutoff performance, flow characteristics, and the valve’s end connections to seamlessly integrate with the existing piping system. By carefully assessing these parameters, users can identify the Resilient Seated Butterfly Valve that best meets their specific application requirements, ensuring reliable and efficient flow control.

Features of Resilient Seated Butterfly Valve

Tight Shut-off

• The resilient seat design of these valves provides superior sealing performance, enabling tight shut-off even in the presence of particulates or media that may compromise conventional butterfly valve sealing.

Corrosion Resistance

• The use of specialized materials and coatings for the valve body and resilient seat components ensures enhanced corrosion resistance, making these valves suitable for harsh environments and aggressive media.

Ease of Operation

• The butterfly valve configuration, combined with the resilient seat, allows for smooth and effortless operation, requiring minimal torque to open and close the valve.

Versatility

• Resilient Seated Butterfly Valve can be designed with a range of end connections, including flanged, wafer, and lug styles, to accommodate various piping systems and integration requirements.

Reliability

• The resilient seat’s ability to compensate for wear, thermal expansion, and surface irregularities enhances the overall reliability and longevity of the valve, reducing the need for frequent maintenance.

Advantages and Disadvantages of Resilient Seated Butterfly Valve

Compact Design

• The compact and lightweight design of Resilient Seated Butterfly Valve makes them easy to install and require less space in the piping system.

Cost-effectiveness

• Compared to other valve types, Resilient Seated Butterfly Valve can often be a more cost-effective solution, especially for larger pipe sizes.

Versatility

• These valves can be used in a wide range of applications, from process control to on/off isolation, making them a versatile choice.

Reduced Maintenance

• The resilient seat design and self-relieving capabilities of these valves can lead to reduced maintenance requirements compared to traditional metal-seated valves.

Disadvantages:

Limited Bi-Directional Sealing

• In some designs, the resilient seat may not provide the same level of bi-directional sealing performance as other valve types, such as gate or ball valves.

Temperature Limitations

• The resilient seat materials used in these valves may have temperature limitations, restricting their use in high-temperature applications.

Potential for Leakage

• Over time, the resilient seat can experience wear and degradation, which may result in potential leakage if not properly maintained.

Flow Characteristics

• The butterfly valve design can sometimes result in less favorable flow characteristics compared to other valve types, particularly in applications requiring precise flow control.

The Specifications of Resilient Seated Butterfly Valve

Specification	Details
Type	Triple Offset Resilient Seated Butterfly Valve
Ball Material	N/A (Butterfly Valve)
Attachment Type	Wafer
Thread Standard	N/A
Thread Size	N/A
Body Material	Carbon Steel
Safe for Use With	Water, Oil, Gas, Chemicals
Handle Type	Lever
Handle Material	Carbon Steel
Maximum Working Pressure (psi)	230 psi
Maximum Working Pressure (bar)	16 bar
Operating Pressure	0-16 bar

The Installation Steps for Resilient Seated Butterfly Valve

Step 1: Valve Inspection

• Carefully inspect the valve for any shipping damage or defects before installation.
• Ensure that the valve size, pressure rating, and materials are suitable for the application.

Step 2: Piping Preparation

• Clean the pipe interior to remove any dirt, debris, or welding residues.
• Ensure that the pipe ends are properly aligned and free from distortion.

Step 3: Valve Orientation

• Determine the correct orientation of the valve based on the flow direction and accessibility for operation.
• For wafer-style valves, center the valve between the flanges and ensure proper alignment.

Step 4: Flange Connection

• For flanged valves, use the appropriate gaskets, bolts, and nuts to secure the valve to the mating flanges.
• Tighten the bolts in a criss-cross pattern to ensure even compression of the gaskets.

Step 5: Valve Actuation

• If the valve is equipped with an actuator, connect the actuator to the valve and ensure proper operation.
• Adjust the actuator limit switches or positioner as needed to ensure full open and close positions.

Step 6: Pressure Testing

• Perform a pressure test on the installed valve to verify the integrity of the connections and the valve’s sealing performance.
• Follow the manufacturer’s recommended pressure test procedures and guidelines.

Step 7: Final Inspection

• Visually inspect the valve installation for any leaks or irregularities.
• Ensure that the valve can be operated smoothly through its full range of motion.

The Operation Theory of Resilient Seated Butterfly Valve

Sealing Mechanism

• The resilient seat material, typically made of elastomeric compounds, provides a tight seal against the valve disc when the valve is in the closed position. This resilient seat conforms to the shape of the disc, creating a reliable and durable seal.

Disc Rotation

• When the valve is opened, the disc rotates 90 degrees from the closed position, allowing for the flow of media through the valve. The disc is designed to minimize flow turbulence and pressure drop.

Pressure Balancing

• The unique offset design of the resilient seated butterfly valve creates a pressure balancing effect, reducing the torque required to operate the valve and improving the overall ease of use.

Resilient Seat Compensation

• The resilient seat material can compensate for wear, thermal expansion, and surface irregularities, maintaining the valve’s sealing performance over time and reducing the need for frequent maintenance.

Manufacturers of Resilient Seated Butterfly Valve:

1. ABZ Valves: ABZ is a leading manufacturer of high-performance industrial valves, including resilient seated butterfly valves. They offer a wide range of sizes, pressure ratings, and material options to cater to diverse applications.
2. Vanessa: Vanessa is a renowned brand known for its innovative resilient seated butterfly valve designs. Their valves are renowned for their exceptional sealing, reliability, and ease of operation.
3. Cameron: Cameron, a Schlumberger company, is a respected manufacturer of resilient seated butterfly valves for various industries, including oil and gas, chemical, and water/wastewater.
4. Velan: Velan is a global valve manufacturer with a strong reputation for producing high-quality resilient seated butterfly valves for demanding applications.
5. Bray Controls: Bray Controls is a leading provider of resilient seated butterfly valves, offering a diverse range of products to meet the needs of different industries and applications.